Meanwhile, in Los Angeles, Marcus' father Brad (Forest Whittaker) is coming out of a "meeting" when he sees his car being towed by Miguel (Carlos Mencia), who happens to be Lucia's father. Brad tries unsuccessfully to halt the tow by holding on to the door of his car. Both Miguel and Brad hurl various racially-based insults at one another. Brad and Miguel meet later that evening and discover that they will soon be in-laws. Both Marcus' and Lucia's family try to out do one another to make the wedding more African-American or Mexican-American, with comedic results.

Lucia has also not told her parents that she recently dropped out of Columbia Law School to volunteer teach at a charter school catering to recent immigrants. This leads Miguel to believe that she will be supporting Marcus as he volunteers as a doctor without pay. When Miguel tells Marcus that he disapproves of him living off his daughter, Lucia says nothing. Marcus feels abandoned, leading to an argument with Lucia about her commitment to their relationship. When Lucia asks Marcus if he no longer wants to get married, he replies he doesn't know, leading her to call off the wedding. She then angrily reveals to her parents the truth about dropping out of law school and living with Marcus for the past few months when Miguel offers to 'toss the ball' and Lucia's mother Sonia refers to it as 'our wedding'.

Lucia's sister Isabel (Anjelah Johnson), who disapproved of her sister getting married, makes Lucia and the rest of the family realize that Marcus makes Lucia happy and that race should not matter. Lucia goes to Marcus, they reconcile, and they end up having a wedding that embraces both African and Mexican customs.

During the end credits, Several pictures of the two families are shown depicting family events. Such as Isabel's engagement to Harry (Harry Shum Jr.), who is Asian-American.

The film has received generally negative reviews from critics. It currently holds a score of 39% "generally unfavorable" at the review aggregator site Metacritic,[3] and a "Rotten" score of 13% at Rotten Tomatoes. Rotten Tomatoes consensus is "Our Family Wedding is a mirthless, contrived affair that does little with its promising premise and talented cast."[4]

Roger Ebert of the Chicago Sun-Times gave the film two stars out of four, describing it as "a pleasant but inconsequential comedy, awkward for the actors, and contrived from beginning to end." He praised the performances of Ferrera and Gross.[5] Lisa Schwarzbaum of Entertainment Weekly gave the film a C-.